Re: Build failure on master, wrong pdmp file loaded

[Ulrich Mueller]

>>>>> On Tue, 23 Mar 2021, Eli Zaretskii wrote:

>> Today I am getting a build failure on master, bootstrap-emacs tries
>> to load its portable dump file from the installed location in
>> /usr/libexec/emacs/ which of course has the wrong checksum:
>> 
>> make -C ../lisp compile-first EMACS="../src/bootstrap-emacs"
>> make[2]: Entering directory 
>> '/tmp/portage/app-editors/emacs-28.0.9999/work/emacs/lisp'
>> EMACSLOADPATH= '../src/bootstrap-emacs' -batch --no-site-file --no-site-lisp 
>> --eval '(setq load-prefer-newer t)'  -f batch-byte-compile 
>> emacs-lisp/macroexp.el
>> desired fingerprint: 
>> d930cd08e3e5ab5bf87a844184483b9c4b361e3275403e685b30e8ce786a8545
>> found fingerprint: 
>> 634291831fdc4e7d29f86299e9f42fcebd422d615dc8061265dbf5b6a633fad2
>> emacs: could not load dump file 
>> "/usr/libexec/emacs/28.0.50/x86_64-pc-linux-gnu/emacs.pdmp": not built for 
>> this Emacs executable

> Why do you have that directory in /usr/libexec/, if you don't install
> Emacs 28?

I do. A previous snapshot of the master branch is installed there.

I've investigated a bit further, the real problem is that dumping of
src/bootstrap-emacs.pdmp fails:

   cp -f temacs bootstrap-emacs
   rm -f bootstrap-emacs.pdmp
   ./temacs --batch  -l loadup --temacs=pbootstrap
   Loading loadup.el (source)...
   Dump mode: pbootstrap
   [...]
   Loading /tmp/portage/app-editors/emacs-28.0.9999/work/emacs/lisp/faces.el 
(source)...
   Eager macro-expansion failure: (void-variable 
read-file-name-completion-ignore-case)
   [... previous line repeated 17 times ...]

Nevertheless, temacs exits with a status of 0, and also the Makefile
seems to ignore that no src/bootstrap-emacs.pdmp was created.